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Grokking JavaScript Fundamentals

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Which method can be used to split a string into an array of substrings based on a specified separator in JavaScript?

A

split()

B

slice()

C

join()

D

cut()

How do you concatenate two arrays in JavaScript?

A

array1.concat(array2)

B

array1 + array2

C

array1.join(array2)

D

array1.push(array2)

What does the following code output?

let fruits = "apple, banana, cherry";
let fruitArray = fruits.split(", ");
console.log(fruitArray[1]);

A

"apple"

B

"banana"

C

"cherry"

D

"apple, banana, cherry"

How can you check if an array includes a certain value in JavaScript?

A

array.has(value)

B

array.includes(value)

C

array.find(value)

D

array.contains(value)

What is the output of the following code?

let msg = "Hello World";
console.log(msg.toUpperCase());

A

"hello world"

B

"Hello World"

C

"HELLO WORLD"

D

Error

What does the following code snippet return?

let greeting = "Hi there!";
console.log(greeting.charAt(3));

A

't'

B

'h'

C

'i'

D

undefined

Which array method adds elements to the beginning of an array?

A

push()

B

pop()

C

shift()

D

unshift()

.....

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